Samir Nasri could face a four-year drug ban at the end of his “Drip Doctor” Twitter-hack nightmare.

The Manchester City midfielder — who is on loan at Sevilla this season — made headlines when he visited the intravenous therapy clinic last month.

Drip Doctors tweeted a picture of Nasri, 29, and founder Jamila Sozahdah with the caption: “We provided Nasri a concierge immunity IV drip to keep him hydrated and in top health during his busy soccer season with Sevilla.”

The former France international’s account was then apparently hacked by British girlfriend Anara Atanes, who claimed the star received a “full sexual service” from Sozahdah after the procedure in a series of bizarre posts.

Nasri later deleted his account — but not before the World Anti-Doping Agency had been alerted to potential doping offenses.

Nasri would have needed a Therapeutic Use Exemption (TUE) to be exempt from regulations.

Spain’s anti-doping agency opened an investigation into the incident on Dec. 28, the day after the Twitter spat, although there is no suggestion that the drip contained banned substances. Still, the practice is banned because it could be used to disguise other forms of doping.

Nasri, who is free to play for the duration of the inquiry, appeared Wednesday in Sevilla’s 3-0 loss to Real Madrid in their Copa Del Ray Round of 16 game.

The midfielder could even suit up against Premier League champion Leicester in the Champions League in February.

WADA declined to discuss the case specifically, but did warn that Nasri could face a lengthy ban.

“A violation of Article 2.2 of the code could result in a sanction of up to four years,” WADA spokesman Ben Nichols said. “However, this will depend upon factors such as whether or not the use was intentional and if unintentional, the sanction could be subject to further reductions on the basis of no significant fault or negligence. The length of the investigation will always depend on the complexity of the case.”